What factors should be considered when purchasing a video game system

aah so many things! To start with you must choose whether you want a portable console.
If yes then the choice is really a psp or Nintendo ds. If you like fun light-hearted games go for the ds but for more serious games go for the psp.
If no then you must choose between an wii xbox 360 and a ps3. A ps3 has free online and has better graphics and more stable gameplay but is more expensive.
The wii is the console for light-hearted games
The xbox 360 is much better for socializing with other xbox 360 users but it charges for all online services; $ 30.00 to 50.00 a year!